Contingencies (Details) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2016 USD ($) claim site	Dec. 31, 2015 USD ($) claim	Dec. 31, 2008 USD ($)
Accrual for environmental loss contingencies [Abstract]
Waste disposal sites with potential liability under the Comprehensive Environmental Response, Compensation and Liability Act | site	26
Accrual for indicated environmental liabilities	$ 5.1	$ 5.4
Timeframe most environmental liabilities will be paid out	5
Contingencies [Abstract]
Loss as a result of the September 2008 DTP ruling			$ 4.0
Asbestos Issue [Member]
Contingencies [Abstract]
Number of pending claims | claim	9,400	10,100
Loss Contingency, Claims Settled and Dismissed, Number | claim	1,200	5,300
Payment being made to a claimant by or on behalf of the company | claim	87	349
Payment being made to a claimant by or on behalf of the company, percentage	7.00%	7.00%
Company paid in defense and indemnity in advance of insurers reimbursement	$ 402.6
Cash and notes received from insurers	228.4
Outstanding balance to be fully recovered	174.2	$ 163.3
Assets:
Other non-current assets	106.0	108.5
Total insurance assets	106.0	108.5
Liabilities:
Accounts payable and accrued expenses	48.3	47.7
Other non-current liabilities	57.7	60.8
Total accrued liabilities	$ 106.0	$ 108.5